Apparatus for compressing plastic material.



M. KOLLER.

- APPARATUS FOR COMPRESSING PLASTIC MATERIAL- APPLICATION men on. 1."H5.

1 1 90,91 2'. Patented July 11, I916.

MAX KOLLER, OF WINTERTHUR, SWITZERLAND.

APPA RATUS FOR, GOMPRESSING PLASTIC MATERIAL.

Specification of Letters Patent.

Patented July 11, 1916.

Application filed October 1, 1915. Serial No. 53,605.

To all whom it may concern Be it known that I, MAX KoLLER, a citizen ofthe Republic of Switzerland, residing at lVinterthur, Switzerland, haveinvented new and useful Improvements in Apparatus for CompressingPlastic Material; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, referencebeing had to the accompanying drawings, and to thefigures of reference marked thereon, which form a part of thisspecification.

The object of the invention, as set forth in the following descriptionand shown in the accompanying drawing is the manufacturing of plates ofcompressible material, especially from beton. Such plates haveheretofore been fabricated by means of heavy presses with pressures ofabout 200 atmospheres, which renders necessary apparatus of exceedinglyexpensive and complicated structure.

On the contrary the compression of the mass by the apparatus accordingto the present invention is obtained by means of a particular method ofstamping.

The necessary strokes are caused by a spring influenced plunger, actingon a by draulic piston. In this manner hydraulic strokes of a requiredstrength may be produced and transmitted upon the proper stampingapparatus by a corresponding system of pipes.

An essential feature of this stamping apparatus is that the strokes actindirectly on the mass to be worked so that the part of the apparatusacting directly on the mass is not lifted from it. This part hasessentially the form of a hydraulic piston. A large mass is given to thecorresponding cylinder which is guided in vertical direction. The abovedescribed hydraulic strokes, acting on the piston and cylinder, tend tosuddenly lift the heavy mass of the cylinder and cause a correspondingcounter pressure on the material to be compressed The strokes may bemade in such a tempo at such intervals that they coincide with theeffect of the mass of cylinder falling down, so that the pressure ofreaction is correspondingly increased. The whole stroke is entirelytransmitted to the material to be worked, as the mass of cylinder isentirely free at the moment of the stroke, so that the strokes do notinfluence any otherparts of the machine.

Besides the support, no part of the apparatus will be mechanicallystrained and the construction of the apparatus will therefore be simpleand cheap. Finally, by providing air buffers, the movement of the massof the cylinder resulting from the water stroke, is limited and due tothis working a regular tempo is secured.

The apparatus for producing the strokes can, if necessary, beadvantageously united constructively with the stamping apparatus.

In the accompanying drawings Figure 1 is a side elevation of a stampingapparatus in connection with the hydraulic spring 111- fluenced plunger,with parts thereof in vertical section; Fig. 2 is a vertical crosssection through the hydraulic stamping cylinder, Fig. 3 shows plan viewsof the clamping keys. Fig. 4 is a side elevation of a modified form ofthe invention with parts thereof in vertical section. v

In Fig. 1 the stroke apparatus comprises a crank 1, connected by aspring 2 to av weighted and guided cross head 3 which carries a plunger1 for producing hydraulic strokes within a cylinder 5. The strokeapparatus is actuated by. a pulley 6 driven by a belt 7 An air chamber 8provided with a cock 9, operates to cut in or out suddenly the strokes.A pipe 10 conducts the hydraulic strokes from the stroke apparatus tothe stamping, apparatus.

The material 11 to be worked is filled into a-mold 12 (Figs. 1 and 2). Apiston 13 is actuated by the hydraulic strokesv and transmits them to aplate 14, which lies on the material to be worked. Said piston is movedwithin a cylinder 15 formed of a heavy weight and incases with itafilling of water 16 upon which the hydraulic strokes act. 17 designatestwo air buffers mounted on a guide frame 18 on which the cylinder 15 ismovably mounted.

The whole system, consisting of the piston 13, cylinder 15, and buffers17, can be raised and lowered into and out .of operative position bymeans of the hydraulic cylinder 18 mounted on the frame and operativelyconnected with the cylinder 15, the operation of the hydraulic cylinderbeing controlled by a three-way cook 19 and the inlet and outlet pipe20, after the keys 21 (Figs. 1 and 3) are opened. In this way the frame12 on the bed 22 can be removed from underneath the piston 13 and befilled or emptied in the known manner.

The working of the apparatus takes place in the following manner: Thespring influenced plunger 4: for producing the hydraulic strokes isactuated by the belt 7 and the pulley 6. The cook 23 is first closed andcock 9 is opened so that the working of the spring influenced plunger onthe stamping apparatus is cut out. The material such as beton to beworked is filled into the frame 12, pulled from underneath the piston13; the frame 12 with the plate 14: is then pushed under the piston andcylinder which are then lowered by means of the hydraulic or similarlifting means and the keys 21 are closed. If now, the cock 23 is openedand the cock 9 closed, the hydraulic strokes act on the stampingapparatus and on the material to be worked. By the reversed successionof these maneuvers the stamping apparatus will be stopped and thefinished plate is freed.

Fig. 4 shows an embodiment of the invention wherein the springinfluenced plunger, for producing the hydraulic strokes, is united in aconstructive manner with the stamping apparatus, the piston 1 workingdirectly in the water filled piston 13.

I claim 1. In an apparatus for compressing plastic material, thecombination of a mold for the material to be compressed, a pistonresting upon the material in said mold, a weighted cylinder for saidpiston filled with a liquid, and means for producing hydraulic strokesin said liquid.

2. In an apparatus for compressing plastic material, the combination ofa mold for the material to be compressed, a weighted cylinder, a pistonresting upon the material in said mold andmovable in said cylinder,

a liquid within the cylinder, a spring in-- fluenced plunger forproducing hydraulic strokes within the liquid, and means for actuatingsaid spring influenced plunger.

3. In an apparatus for compressing plastic material, the combination ofa mold for the material to be compressed, a weighted cylinder, a pistonmovable in the latter and resting upon the material in said mold, aliquid within the cylinder, buffers for absorbing the reactive eifect ofthe cylinder, a spring influenced plunger for producing hydraulicstrokes within the liquid, arid means for driving said spring influencedplunger.

4. In an apparatus for compressing plas- Copies of this patent may beobtained for five cents each, by addressing Washington, D. 0.

tic material, the combination of a mold for the material to becompressed, a weighted cylinder, a piston movable in the latter andresting upon the material in said mold, a liquid within the cylinder, aspring influenced plunger for producing hydraulic strokes within theliquid, means for driving said plunger, an air chamber in connectionwith the cylinder, and a cock for interrupting the connection.

5. In an apparatus for compressing plastic material, the combination ofa mold for the material to be compressed, a weighted cylinder, a pistonmovable in the latter and resting upon the material in said mold, aliquid within the cylinder, a spring influenced plunger for producinghydraulic strokes within the liquid means for driving said plunger, anair chamber in connection with the cylinder, a cock for interruptingsaid connection and buffers for absorbing the reactive effect of thehydraulic strokes exercised on the material not absorbed by thecylinder.

6. In an apparatus for compressing plastic material, the combination ofa frame for the material to be compressed, a weighted cylinder, a pistonmovable in the latter and resting upon the material in said frame, aliquid within the cylinder, a spring influenced plunger for producinghydraulic strokes within the liquid, means for driving said plunger, anair chamber in con nection with the cylinder, a cock for interruptingsaid connection, and a hydraulic lifting means connected with thecylinder.

7. In an apparatus for compressing plastic material, the combination ofa mold for the material to be compressed, a weighted cylinder, a pistonmovable in the latter and resting upon the material in said mold, aliquid within the'cylinder, a spring influenced phmger for producinghydraulic strokes within the liquid, means for driving said springinfluenced plunger, an air chamber in connection with the cylinder, acock for interrupting sa'id connection, buffers for absorbing thereactive effect of the hydraulic strokes exercised on the mass notabsorbed by the cylinder, and means for cutting out the working of thebuffers.

In testimony that I claim the foregoing as my invention, I have signedmy name in presence of two subscribing witnesses.

MAX KOLLER.

Witnesses CARL GUBLER, ARNOLD LEHNER.

the Commissioner of Patents,

llO

